Rotary gas-engine



J. DEUBEL.

ROTARY GAS ENGINE.

APPLacATmN min MAY2B.`1919.

Patented Dec. 14, 1920.

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Patented Dec. 14, 1920.

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UEUbjLL. :OAHY GAS ENGlNEf APPLICATION HLED MAY28.19}9.

Patented me. 14, 1920.

s SHEETS-SHEET 3f l inname I. DEUBEL` ROTARY GAS ENGN.

APPLicAloN min MAY 2g, mvg,

Patented Dec. 14, 1920.

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J. DEUBEL.

ROTARY GAS ENGINE.-

APPLICAHUN man MAY 28. :919.

Patented 1160.14, 192,0.

5 SHEETS-SHEET 5.

UNITED STATES PATENT OFFICE.

JosEPH DEUBEL. or NEW Yank, N. Y.

ROTARY eas-ENGINE.

To all whom it may conceive.'

Be it known that I, Josnrn "DEUBEL, a citizen of the United States. residing in New York city. in the county of New York and State of New York, have invented certain pass.

new and useful Improvements in Rotary Gas-Engines, of which the following is a specification.

This invent-ion relates to rotary engines. blowers, pumps, compressors. etc.. and is illustrated in "the form of a gas engine. al though it embodies a structure which is also suitable for use in either steam or compressed-air engines.

The engine operates upon the principle of a rotary disk having thereon a projection. which, since it corresponds in function to thepiston of a reciprocating engine. is herein termed a piston. It receives the blow of the gas explosion and transmits the power to the rotary disk, and also drives out the exhaust gas, and draws in the charges from the carbureter and compresses them. To cooperate with the piston there is provided a 25 head, which remains at one location. and

corresponds to the head of the cylinder' in a reciprocating` engine; this head being in slidin, r Contact with theface of the rotary disk. and disappearing to permit the piston to The piston may be made of slopingr form, or in the shape of a cam. to force its way past the head. y

In carryingont this principle there are formed upon the rotary disk two or more pistons, with a correspondingr number of heads; the drawings illustrating two pistons upon the disk. Each piston cooperates with one head to form a chamber` and at the same time cooperates with the other head to form another chamber. Thus there are four chambers. the functions of each correspending with that of the cylinder in a reciprocating engine. In one of these Vchambers an explosion occurs. while in another occurs compression. in another intake. and

in the fourth exhaust. All four of these functions may be performed twice duringr each complete revolution 4of the disk.

At this point is given, for the purpose of explanation, a diagram of the operations occurring in two revolutions of the fly wheel of a reciprocatmg gas engine of ordinary Specication of Letters Patent. Patented D96, 14, 1920.

Application led May' 28, 1919. Serial No. 300,398.

form having;r two pistons suitably connected to operate in each direction at the same time. the explosions, etc., occurring in proper seqnence on both sides of each piston. which is represented by the letter I.

- Ex losion I- Compression Ex aust Y- I- EX losion. Intake I EX aust.

Com ression I- Intake.

Inta e I Exhaust. Com ression L Intake. Eig os'ion I Com ression. E aust -I Exposion.

With this' diagram may be compared a cycle of operations performed by the diametrically opposite pistons on the rotary `disk of my novel ,gas engine, which may be seen in the following diagram, which is a development of the rotary course of the pistons, wz.:

First mlf of revolution.

Piston Head Piston A B C I- Exhaust -I Intake. -I

Hlid A Compression I Explosion I.

l Seco/nd half of resolution;

c B A Compression I Explosion 1.

In the last diagram, the pistons are marked A and C, while the heads are marked B and D.

In a reciprocating gas engine, the charge :ail s:

In order tol carry out a proper cycle ot operations ina motor o i this kind, the charge is drawn in hy one piston and compressed hv the other, and then exploded upon the rear side of the advancing' piston which has i ust effected the compression. To do this. the charge is compressed liy the piston and thereafter forced into a pocket or lock. The piston then passes by the lock and al'ter passing is exposed to the force of the eX- plosion upon its rear tace; the lock serrinpr as an explosion chanilier. This cycle ot operations occurs twice in each revolution of the disk.

The heads are 'annned in one direction by the advancing pistons. and in the opposite direction hy means ol: earns provided upon a companion disk. which is i-eared to the first to run in the opposite direction. The earns upon one disk t'acc those upon the other disl Preferably the vains upon this companion disk are also used as pistons. to operate in connection with the saine lock in the inanner already described in connection with the first disk. Two additional iuovahle heads are used in connection with the second disk. to he Inorcd in one direction hy its rains. and in the opposite direction hy the camsl or pistons ot' the tirst disk: .so that. each disk parti)Y operates hoth its own heads and those which appertain to the other disk. The heads appertainineV to one disk are paired with those which lie-lone.f to the other: the pairs heine diametrieally opposite. in case. only two pistons are employed upon each disk. lt three pistons are used on each disk. three pairs of heads will he required. the pairs separated hy lltl degrees. In each pair. the heads are separated a distance which is equal to the distance from the top to the bottoni of a cani. so that twii, in each revolution all tour heads ma)I hear against the crowns or apices oi' their respectivel pistons simultaneously.

The engine is therefore of duplex con struction. with multiple-piston disks facingr each other and running in opposite directions, the pistons inthe form of cams for reciprocatinp` the heads or ahutinents which cooperate with the pistons to forni workchamhers. The charges may he taken from any suitable carhureter. and the ignition of the charge may he effected by a spark producer, Theexplosions. ot' which there are twfrilfheaeh revolution of the engine, occur in an explosion chaniher or lock which is common to the two disks.

Other features and advantages will hereA inafter appear.

In the acctnnpanyiingY drawings.

Figure 1 is a front elevation. partitT broken away. of a gas or gasolene motor, embodying my improvements in one form,

Fig. Q is a sectional elevation of the same, taken about on the line 2 2 oiv Fig. 1.

Fig. 3 is a perspective view of one of two faceplates which forni the outer walls of the motor.

Fig. l is a perspective View of one of th rotary piston-disks.

Fig. 5 is a perspective view of one of the casinos in which rotate the disks, ot' which one is shown at Fig. 4.

Fig. t3 is a perspective View of the central portion of the framing of the engine.

Fig. T is a face View and Fig. 8 .is a sectional view of one of the rotary piston-disks seen at F ig. 1. i

Fig. l) is a View of a disk-like bracket which torxns part of the framing and supports the pistons which connect the pistondisk for opposite rotation.

Fig. l() is a sectional View, showing the pinions.

Fig. l1 is a perspective View of one of the heads which cooperate with the pistons to take in the charge. compress the charge. dritje the pistons and expel the charge. Y

Fig. 12is a perspective View of the plate which closes an explosion chamber and forms the seat for spark-plugs.

Fig. 13 is a perspective View of the motor, with parts broken away.

Fig. 11 is a sectional detail of one of the iulct-ports. with hack-check-valve. used for drawing auxiliary charges 'from the carbureter.

Fig. 1:7 is a sectional diagram to illustrate the relation of the cam-like pistons and certain of the heads at about` the time the charge is explodedor is to lie exploded.` that drives the motor.

Fig. 16 is a sectional detail of one of the heads. showing the method of detaining the saine in its opposite extreme positions.

Fig. 17 is a side elevation of one of the' heads. showingr a port through which charge is compressed into the chamber which earries the heads.

"Fig. 17a is a sectional detail of a hall Valve used iinthe heads seen at Fig. 17.

Fig. 18 is a sectional detail. showing a port with a` check-valve to close the same. this port opening.r into the general explosion chamber to permit enough auxiliary chantrer tohe forced thereinto. l

Figs.` 19 w26. inclusive. are central sectional views, to illustrate a cycle of operations of the pistons and -head; Figs. 19 and 23 being read together; Fig. 19 showingr the near side of the motor, while Fig. Q3 shows .the 'far side with the parts in the positions which they occupy when the motor is in the position indicated at Fig. 19. Figs. 20 and 24 aresimilarly to he read together, and the same 1s true of Figs. 21 and 25, and also of Figs. 22 and 26.

Figs. 27 to 34 are` perspective diagrams with the piston-disks separated to an exagerated extent for the sake. of clearness. gig. 27 may be regarded as showing .the beginning of a cycle which continues through Figs. 28-34 until the position at 27 is again reache A fly wheel 4() may be fast upon a shaft 4l, to which is keyed at 42 a disk 43. At a Vthat the segmental space short distance from its outer edge the disk has a face liange 44. An annular pistonchamber 45 is formed partly by said flange, partly by the face of the dlsk 43, partly by the cylindrical 4wall of the drum 46 within which the disk is fitted, and partly by a vertical face or wall 47 of the drum. The disk is confined by means of a cap 48 Awhich forms the outer vertical wall of the drum, being bolted thereto at 49. The disk and its fiange fit closely between the vertical walls of the drum, and Within the cylindrical portion 46 thereof, which may be integral with Wall47.

Also keyed at 50 upon said shaft 41 is va bevelgear 51, which is connected by bevel pinions 52 with an opposite concentric bevel gear 53, keyed upon a shaft 54 in line with 41 but turning in the opposite direction at the same speed. and provided if desired with a fly wheel. In correspondence with shaft 41, shaft 54 carries a disk 55, having face flange 56; an annular piston chamber 57 being formed by flange 56, disk 55, cylindrical portion of drum 58, and `vertical wall 59 of the latter; said drum 58 also comprising a cap or outer vertical wall 60. The disks 43 and 55 revolve in opposite directions at equal speeds.

The pistons upon disks 43 are designated as 61 and 62, and those upon disk 55 asv 63 and 64. The heads or movable abutments to coperate with the pistons, extend through guide-openings 65, of which four are formed upon an annular casting or framework 66, Figl 6,. to the opposite parallel vertical faces of which are bolted at 67 thedrums 46 and 5.8; said fi'amework occupying the middle portion ofthe engine, and containing the train of bevel gears which connects the two piston disks.

Each movable head or abutment is double, that is, it comprises two heads moving as one piece, one for engagement with the pistons or cams of one disk, and the other for engagement with the pistons or cams of the opposite disk. The heads which in rotation engage with each of the pistons 61 and 62 on disk 43, are, designated as 71, 72, 73 and 74; while those which correspondingly -engage the pistons on disk 55, are designated as 81, 82, 83 and 84. These heads iit in the annular piston-chambers 45, 57, close the same, so betwcerifany two istons may be subdivided into sub-chamers; the operations mspiration; compression, explosion and` exhaust occurring at the saine time in the appropriate sub-ohan1 bers turing each half-revolution of each disk. Each double head is in the forni of a bar oblong in crosssection, being fitted in guideslots 85 in the opposite inner dru-m walls 47, 59, Fig. 5; and the ends of the bar may be rounded, as at 86, Fig. 11, to render it easily operable by the cams.

As seen at Fig. 19, the oppositely revolv ing pistons 43 and 55 may come to such relative rpositions that each double head stands at the apex of one piston and at the base of the other; the double heads in each pair being separated a distance equal to the length of the sloping side of a piston. A double head may hence be forced aside by one cam or piston while at its other end it rides down the slope of the cani upon the opposite disk.

The engine may either manually or in any suitable way; and in explaining the operation it will be understood that the engine is under way, so that the compressionpf each charge takes place automatically.

To follow the cycle of actions taking place in connection with one of the revolvlng disks 43, it will he seen that' from any suitable carbureter 87 the gas may' be lcd through a pipe 88 to an inlet orifice 89, Figs. 5 and 13, adjacent to one of the heads As the piston 61 advances upon this head, thelatter is forced aside, but is caused to recover its effective position as the piston passes. Said piston 61 immediately passes the inlet port 89; that said head temporarily divides thc segmental space between this piston and the following piston into two sub-chambers, in one of which is located the inlet port 89,

so that a charge of gas mixture from the car- 'between head 71 and the following piston compressed beadvancing p1s marked 62. VSaid charge is tween said head 71 and said ton 62, and forced by said piston through a passage 90 in the head, Fig. 17. and into a small cylinder 93 formed in the middle frame 66.

In said gas passage 90 in the head 7l is provided a ball valve 91, Fig. 17, for closing the passage against flow in the opposite direction. At its inner end the passage tcrminates at 92 within said cylinder 93, the double head passing through said cylinder from end to end, and having at its middle a iston 94 reciprocating in said cylinder.

uring the compression of the fresh charge,` that is, during the advance of piston 62 toward the head 71, such charge is forced into the left-hand end of the cylinder 93,

be started into action and it will be understood operate with a spring-pressed datent 96,

' the lock 98, which is located at a at Fig. 15; and the left-hand end of the piston 94 `may be cupped out at 95, to increase the capacity o f this end of the c linder, so that the charge may not be too highly compressed. To prevent endwise displacement of the double head 71, 81 toward the right on the pressure of the charge, the head 81 may be provided with ja recess 96 to colVhen the head 8l is 1n the ositi'on seenl in Figi 15the detent may be ockeddown to firmly hold the head 81 in this position. This .is done by a rock arm 96b being forced downward on the dctent pin 96fA and held in this locked position by a 'cam 54a on the shaft 54, through the medium of a follower arm 54b mounted on the side cap 60, and link 54 connecting the rock arm 96h. The double head 72, 82 is likewise provided with a recess, a s ring-pressed detent, and a rock arm to lock it against displacement (sce Figs. 1 and l5).

At Fig. 15, the cross-piston 94 serves as a valve to close a port 97 leading from the compression cylinder 93 into a ocket or y lock 98, which serves as an explosion chamber. This port 97 is not opened until Athe previous charge in lock 98 has been exploded and fully expanded, that is, until a chamber between the i-ear side of the revolving iston 61 and the head 71 has-about reachedp its .maximum dimensions. Said cross-piston or valve 94 is `caused to move to uncover said port by means of the engagement of the advancing piston 62 withthe head 71, the latter being 4forced to the right at Fig.` 15, while the corres onding head 81 descends the advancing siti) A The com ressed charge enters through said port 9 and occupies said pocket 98; and a valve 99 preventsescape of the compressed gas from saidlock 98; said valve device or valve-box being in the form of a 'screw` Fig. 18, and having a passage endwise therethrough and containing a back-check 100 and a spring 101.

The gas remains momentarily conned 1n point be- 72, and imtween the pairs of heads 71,

until the adprisons the compressed "charge Vvancing piston 62 has advanced just beyond said lock 98; the explosion ofthe coin-pressed charge then serving to dlliiiveutbe-'pln 62 and thereby give an impulse tothe" engine.

At Fig. 15 the piston 6,1 is shown as in the .vicinity of the position atwhich-.naeharge Y in lock 98 is' about tobe let into",igli'e` view formed chamber between- 61yand 71 and enploded; although the passage between 'said lock 98 and said newly formed chamber may be opened at a little earlier stage, before the chamber is of such great ca acity.

It is noted at this poin that the crosspiston or valve 94, 'which is reciprocated by the .cams or pistons on the opposite disks 43,

e o f the opposite piston 63.l

rotation of the disks 55, may if desired be also utilized for drawand-air mixture'from the carbureter main 88, and compressing these charges, forcing them through the ports 97 into the lock 98, to increase the efiicienc of the engine. Said lock 98 is the genera?Y recipient of all the charges, including both thosethat are compressed thereinto by the revolving istons, and also those that are forced thereinto by the reciprocating pistons.

It will be further noticed that while the aforesaid charge of air and fuel was bein' compressed between iston`62 Iand head/71 and forced into Vcylin er 93, a similar char e was being compressed on the opposite sie of the engine, between piston 64 thereon and head 82, and forced through 'said head into cylinder 102, in which the cross-piston or valve is cupped out at 103; and further that said head 82 is forced aside by the advancing piston 64 while 71 is being shifted by piston 62, and hence that port 104 in cylin der 102 is admitting the compressed charge into the lock 98 at" the same time that the charge is admitted thereinto through port 97.

It will a'iso be understood that when compressed cliarge is admitted to the newly formed chamber between piston 62 and head 71, it is simultaneously .admitted between piston 64 and head 82; and that a single spark 'explodes the enti-re charge both in the lock 98 and in each of chambers.

Thus the companion disks receive impulses simultaneously, twice in each revolution; and it Will be understood that the operations of exhaust, inspiration and compression and explosion occur with one disk the same as with the other, except that the direction of is one the reverse of the other, and that the exhaust and intake ports are correspondingly placed. Y

At Fig. 19 is shown the position of the parts at'a slightly earlier stage than at Fig. 15. At Fig. 19 the chargeswhich have been compressed into the cylinders 93 and 102 said newly formed ing in charges of either air alone, or a gashave been admitted to lock 98, by the opening of the ports 97 and 104, said ports having been opened by the advancing pistons 61 and 63,.which have just completed forcing aside the heads 71, 82 which coperated with the pistons or valves 94,` 103j in opening said ports. Thus the pistons first cooperate with Vthe heads to compress the charges, forcing the charges through the heads into the cylinders, and then to open the ports which admit the charges into the explosion chamber. then coperate to reverse the action of the cross-pistons, to eifect a final forcing of the compressed charges into the lock 98 Ajust previous' to the explosion, which may be timed `to occurwhen the parts are at the Fig. 20 position, the rotary pistons having The pistons and heads just passed the ports 105 and 106 leading from the explosion chamber or pocket 9S into the chambers in which the pistons rotatefTAt the same time the cross-pistons draw vin fresh auxiliary charges from the cafrbureterthrough ports 107 and 103, preparatory to forcing them through ports 110 and 111 `into the lock 98 at the next stroke. Since the cross-pistons may have considerable "area and length of stroke, and since they supply charges of fresh gas and air unmixed with the products of combustion, it willhe seen that the lock 98 mav be sup plied from all sources with a satisfactory explosive charge under compression.

The explosion may be timed to occur either at the Fig. 20 position, or at the position seen at Fig. 21, or at some other point, according to the speed of the engine and to secure any desired result. When the parts have reached'the Fig. 19 position, the pistons have been cammed endwise and forced fresh explosive mixture into the lock through the ports 110, 111. At Fig. 19 the cross-pistons and heads are seen at the oppositel extremes of their movements from Fig. 21. They remainin the Fig. 21 position during the compression of the succeeding charge each of the rotating pistons 62 and 64. ening 112 to ride upon a cam 113 corresponding with 96 and 97.

Just previous to said explosion. valves 114 and 115, closing ports 105 andV 106 in the opposite ends of the lock 98, are automatically opened by means of face cams 116 formed in grooves 117, 118 cut in the inner faces of the piston flanges 44, 56, Fig. 2; these face cams engaging the ends of projecting pins 119 carrying arms 120 engaging grooves 121 in the valves. The latter have stems 122 sliding in guides 123 provided upon the inner frame 66, Figs. 2 and 6, as well as guide-pins 124 working `in slots in said guides` to prevent rotation of the valves. vAfter the face cams 116 have passed lthe projections 119, the valves are thrustout byja common cam, lin the form of a cone 125 upon the end of'a stem 126, thelatterv forced by a compression spring 127 in a direction to wedge the stems 122 and hence the valves apart; lsaid stem 126 being loosely guided, to enable the cone to force both valves 114 and 115 to their seats.

Said face cams 116 have long dwell portions or faces -116, and therefore continue to hold thevalves 114, 115 open until the pistons reach or pass thesucceeding heads 73, 84. Thereafter the succeeding pistons 62,^64,co'perate with saidl heads i3, 84 to expel the waste gasfrom the sub-chambers formed-between said` pistons and said heads; the' gas escaping through exhaust ports The engine maybe started by forcing the b gend 72 has an offset or thick` disks to rotate by any suitable means, to draw in and compress charges; and to trace the cycle of operations from the point shown at Figs. 19 and 27, for example, it will be seen that cylinders 93 and 102 l contain charges of compressed gasand air, which has just been forced thereinto by advancing pistons 61 and 63. As the disks continue to rotate, the heads 71 and 82 are forced in thereby, reducing the sizeof the small subchambers between said pistonsnand the heads '72 and 81, and forcing a little more compressed charge through the yieldable valves 105 and 106 into the lock 98. -As soon as 61 and 63 pass the lock, Fig. 20, the valves 105 and 106 are automatically opened, and

the charge is exploded by the useof one 82. Fig. 21 may be read together with Fig. j

25, in which the disks are in the same position, but in which the pistons 62, 64 are shown in vdotted'lines; and it will be understood that afresh charge is being compressed hetween piston 62 and head' 71, as well as between piston 64 and head 82. The charge that was previously exploded and fully expanded is being yforced out through exhaust ports 12S and 129 bv pistons 61 and 63 advancing toward heads J 3 and 84. New charges are being drawn in from the carbureter through intake ports 89 by pistons 62 and 64, which for this purpose are ,coperating with heads 73 and 84, respectively.

The heads 73, 83 and 74, 84 may bc detained at either extreme of movement by beveled detents 135 ressed by springs 136 into seats in the hea s: As is clear at Figs.

19"21, as soon as any piston reaches a head,

nrmallyin the positions seen at Figs. 22

and 23, but twice in each revolution are shifted as at Figs. 19 and 23, by the advancing pistons, and immediately returned to normal positions, their return movements being indicated at Figs. 20 and`24,

*andA the completion of such movements at Figs..21 and 25. i

At Fig. 27, pistons 61, 63 have just completed compression, in coperation with heads 71 and 82, which are now seen as forced aside by these pistons. Said pistons have also just completed drawing 1n Jfresh charges from the Carbnreter, having tor this urpose cooperated with heads T4 and Bil. )istons 62 and 64 are shown at the completion of the impulse stroke. that is, at the end of the stage through which they are driven by the expanding gas, having for this purpose cooperated with b `ads 7l and 52. Said pistons 62 and 64 are also shown as having completed the expulsion of the spentl gases from which the engine reeeived its previous impulse, having for this purpose eoi'iperated with beads 73 and 84.

Fig. 2S shows the parts in positions oetween Figs. 2T and 29. At Fig. 29. the pistonV 61 is shown having restored head 82 to normal position. and piston (32% as ha ving restored `head Tl to normal position; the pistons 62 and t-l respectivelyv having also restored B4 and Tl to normal. At Fig. 29 the charge is expanding between head 71 andY piston G1, to drive the latter; and 6l is cooperating with head T3 to expel the spent gas of the previons explosion. Piston 62 is cooperating with head T3 to draw in a fresh charge of air and tnel; and said piston G2 is also eoiperating with bead T1 to compress a eharge. Voi-responding work is being performed by pistons 63 and tS-t in cooperation with heads H2 and Hl. At Fig. 30. the pistons have advanced nearlv a half revolution from the Fig. 29 position, and the various operations initiated at Fig. 29 are now nearly completed.

At Fig. 3l. the parts are advaneed a little beyond the Fig. 3f) position. and are halt a revolution beyond the Fig. 2T position. so that pistons (il and l'r. have ehanged places. and 62 is now beginning to perform the work described in eonneetion with 6l at Fig. 2T; and a similar reversal exists as to the pistons ('13 and tS-l.

Figs, 3Q. 33 and iii eorrespond respeetively with Figs. lh. 2? and llt). except that the pistons on eaeh disk have changed places: and it will be seen that the parts in advancing a little beyond the Fig. 3i Aposition. rearh the Fig. QT position. thus eompleting the u vele.

A water-jacket i237. Figs. 1 2. is shown surrounding the flanges of the drums 4G,

and the framework Gti. i'orminer a ebamber ls. supply of eool water mayv be rireulated therein to keep the mechanism 1from overheating. and for this purpose there is provided inlet and outlet pipes 139 and 140. Fig. 13.

Variations ma)Y he resorted to within the seope ol' the invention. and portions of the improvements maibe used Without others.

llaving thus desrribed my invention. I claim l. The combination of a rotary disk havinte,lr pistons projecting therefrom. an anna- ]ar channel 1n which said pistons travel, means to cooperate with said pistons to draw in charges, to compress the eharges, to Cause `he pistons to be driven at the explosions 0f the charges. and to expel the waste gas after the explosions. said pistons being equally separated upon the disk,y and sets ot' movable heads to correspond with the pistons. eaeh set comprisingr two heads.

The combination of a rotar-3y disk having pistons projecting therefrom. an annular ehannel in which said pistons travel. means to cooperate with said pistons to draw in charges. to eompress the charges, to cause the pistons to.,be driven at the explosions of the eharges. and to expel the waste gas after the explosions, said pistons being etpiall \l sepanted upon the disk. and sets ot movable heads to correspond with the pistons. eaeh piston eope `ating with a bead to form a sub-ebamber on one side of the piston, and at the same time eoiiperating with another head to form a sub-chamber on the other .side ot the piston.

3. The Combination of a rotar)Y disk having pistons projectingtherefrom.an annular il ll Channel in wbieh said. pistons travel. means to cooperate with said pistons to draw in eharges. to rolnpress the ebarges. tio cause the pistons to be driven at tbe explosions ol the ebarges. and to expel4 the waste gas after the explosions. said pistons being equally separated upon the disk. and sets olA movable heads to eorrespond with the pistons. eaeb set Comprising two heads. said pistons roiperating with said beads to form four slib-Chambers for simultaneous intake. rompression. explosionand exhaust. all four of these tunetions being performed twice dnring eal'b revolution of the disk.

4. A gas-engine comprising a rotar-Av disk. n piston thereon. a ehannel in whieh the piston travels. movable beads. and means to enable said beads to cooperate with said piston to draw in and eompress a vbarge. an'l to raiise the eompressed charge to be eX- ploded upon the opposite side oll the piston. said means including a rompanion disk. and means eonnecting said disk to rotate in the opposite direetion. said companion disk bavin;r a cam to eoiiperate with the piston on the first disk to eontrol the heads.

5. ln a gas-engine. the combination With `a rotary disk and pistons thereon and a Febannel m whnb the pistons travel. oiE

lll)

and for opening the lock to explode the charge upon the rear side of the advancing piston twice ineach revolution of the disk; said cooperating means including a companion disk, and means connecting said disk to a rotary disk and pistons thereon, and' a channel in which the pistons travel, of means to cooperate with said pistons to enable the pistons, one after another, to drawin and compress charges, each piston compressing the charge that is drawn in'by the other piston, and means for exploding the charge upon the rear side of the advancing piston by which the compression has b en -eii'ected,jmeans being provided for temporarily confining the compressed charge, for admitting the co'inpressed charge into a lock, and for opening the lock to explode the charge upon the -rear side of the advancing piston twice in each revolution of the disk;

said cooperating means including a coin-4 panion disk, and means connecting said disk to rotate in the opposite direction from the first disk, said companion disk having cams to coperate With the pistons on the first disk to controlthe heads, said cams `upon the companion disk serving also as pistons to operate in connection with the same lock.

7. The combination of aV rotary disk hav ing pistons projecting therefrom, an annular channel in which said -pistons travel, means to cooperate with said pistons to draw in charges, to compress the charges, to canse the pistons to be driven at the explosions of the charges, and to expel the Waste gas after the explosions, said pistons being ,equally separated upon the disk, and said coperating means including sets of heads to correspond with the pistons, and a cooperative disk having similar pistons and connected to rotate in the opposite direction.

8. The combination of a rotary disk having pistons projecting therefrom, an annular channel in which said pistons travel, means to cooperate With said pistons to draw in charges. to compress the charges, to can-se the pistons to be driven at the explosions of the charges, and to expel the Waste gas after the explosions, said pistons being equally l separated upon the disk, and said coperating means including sets o-f heads to correspond with tha-pistons, and a cooperative disk having similar pistons'and connected to rotate in the `V opposite direction, each set comprising two double heads, one foreach disk. f

9. The combination of a rotary diskhaving pistons projecting therefrom,`an annular channel in lvvhich said pistons travel, means to cooperate with said pistons to draw in charges, to compress the charges, to canse the pistons to` be driven at the explosions of the charges, and to expel the Waste gas after the explosions, s aid pistons being equally separated upon the disk. and said cooperating means including sets of heads to correspond with the pistons, and a coperative disk having similar pistons and connected to rotate in the opposite direction, each set comprising two double heads, one for each disk, eac piston coperating with a head to form a chamber on one side of the piston, and at the same time coperating vith another head to form a chamber on the other side of the piston.

10. The combination of a rotary disk having pistons projecting therefrom, an annular channel in which said pistons travel, means to coperate with said pistons to draw inl charges, to compress the charges. to cause the pistons to be driven at the explosions of disk, each piston coperating with a head to form a chamber on one side of the piston, and at the Vsame time coperating with another head to form a chamber on the other side of the piston, said pistons coperating with said heads to form four chambers in each channel for simultaneous intake. compression, explosion and exhaust, all four of these functions being performed twice during each revolution of cach disk.

' 1l. A gas engine comprising a rotary disk, a piston thereon, a channel in which the piston travels` movable heads, and means to enable said heads to coperate with said piston to draw in and compress a charge, and to cause the compressed charge to be exploded upon the opposite side of the piston, said means including a companion disk. and means connecting said disk to rotate in the opposite direction, said companion disk having a piston to coperate with the piston on the first disk to control the heads, heads being provided .for said piston upon said companion disk.

12. A gas-engine comprising a rotary disk, pistons thereon, a channel in which the pistons' travel, movable heads, and means to enable said heads to coperate with said pistons to draw-in and compress charges, and to cause the compressed charges to be exploded upon the opposite sides of the pistons, said means including a companion disk, and means connecting said disk to rctate in the opposite direction, said companion disk having pistons to coperate with the pistons on the rst disk to control the heads, heads beingT provided for Said pistons upon said companion disk, the heads for the pistons upon one disk being conneeted.to those t'or the pistons upon the opposite disk. to form double heads to be cannned to and fro by the opposite pistons, so that each disk partly1 operates both its own heads and those which cooperate with the pistons oi the other disk.

13. A pas engine comprising,1r a rotary disk. pistons thereon` a channel iii which the pistons travel, movable heads. and means to enable said heads to coperate with said pistons to draw in and compress charges, and to cause the compressed charges tobe exploded upon the opposite sides of the pistons, said means includinga companion disk, .and means connecting),r said disk to rotate in the opposite direction, said companion disk having pistons to oo peratc` with the pistons on the first disk to control the heads, heads being provided for said pistons upon said companion disk, the heads for the pistons upon one disk beingr connected to those for the pistons upon the opposite disk, to form double heads to be cammed to and fro by the opposite pistons, so that each disk partly operates both its own heads and those which coperate with the pistons ofthe other disk,

the heads which appertain to one disk being paired with those which appertain to the other.

14. A gas-engine comprising a` rotary disk, pistons thereon. a channel in which the pistons travel, movable heads` and means to enable said heads to cooperate .with said pistons to draw in and compress charges, and tocanse the compressed charges to be exploded` upon the opposite sides ot' the pistons, aid means including a` companion disk, and means connecting said disk to rotate in the opposite direction, said companion disk having pistons to coperate with pistons on the first disk to control the heads, heads being provided for said pistons upon said companion disk, the heads for the pistons upon one disk beingr connected to thoseI for the pistons upon the opposite disk, to form double heads to be cammedto and fro by the opposite pistons, so that each disk partly operates both its.own heads and those which cooperate with the pistons of the other disk. the heads which appertain to one disk being paired with those which appertain to the other. the pairs being diametrically opposite.

15. A gas-engine comprising a rotary disk, pistons thereon, a channel in which thel pistons travel, movable heads, and means to enable said heads to cooperate with said pistons to draw in and compress charges, and to lcause the compressed charges to he exploded upon the opposite sidesrof the pistons, said means including a companion disk, and means connecting said disk to rotate in the opposite direction, said compan- "ion disk having pistons to cooperate with the pistons on the first disk to control the heads, heads being provided for said pistons upon said companion disk, the heads for the pistons upon one disk being connected to those for the pistons upon the opposite disk, to form double heads to be cammed to and fro by the opposite pistons, so that each disk partly operates both its own heads and those which cooperate with the pistons of the other disk, the heads which appertain to one disk being paired with those which appertain to the other, the pairs being diametrically opposite, the heads in each pair being separated a distance which is equal to the distance from the top to the bottom of a cam or piston, so that, twice in each revolution, all fonrheads bearagainst crownsQor apices of their respective pistons simultaneously.

16. A rotary engine comprising multiplepiston disks facing each other and running in opposite directions, annular channels in which the pistons travel, the pistons in the form of cams for reciprocating the heads or abutments which cooperate with the pistons to form work-chambers.r

17. A rotary engine comprising multiplepiston disks facingr each other and runningr in opposite directions, annular channels in which the pistons travel, the pistons in the form of cams for reciprocating the heads or abutments which cooperate with the pistons to form work-chambers, an explosion chamber or lock bein r provided which is common to the two c isks.

18. The combination of a shaft, a. piston disk thereon havingr a tace Flange forming partof an annular piston channel or chamber. said chamber beinrgr also formed partly by the face 'of said disk, and partly by a cylindrical wall of a drum within which the disk is fitted, and partly by a vertical face or Wall of the drum, a bevel gear upon said shaft, a` bevel pinion meshing;r with said gear, an opposite bevel gear also meshing with said pinion, and a piston disk connected to the last-.mentioned )evel gear to revolve in the opposite direction from the first disk.

19. The combination of a shaft, a piston disk thereon having,r a face flange forming,r part of an annular piston channel or chamher, said chamber being also formed partly by the face of said dlsk, and partly by a cylindrical wall ot a drum within which the disk is fitted, and partly b v a vertical face or wall of the drum, a bevel ,gear upon said shaft, a bevel pinion meshing with said gear, an opposite bevel gear also meshing with said pinion, and piston disk connected to the last-mentioned bevel gear to revolve in the opposite direction `from the first disk, the secondY piston having a face ange forming part of an annular piston chamber, and a .cylindrical drum portion and a vertical titi lllll drum wall forming the remainder of said chamber. i

20. The combination of a shaft, a. piston disk thereon having a face flange forming parto an annular piston channel or chamber, said chamber being also formedpartly by the :tace of said disk, and partly by a cylindrical wall of a drum within which the disk is fitted, and partly by a vertical face or wall of the drum, a, bevel gear upon said shaft, a bevel pinion meshing with said gear, an opposite bevel gear also meshing with said pinion, and a p1ston disk connected to the last-mentioned bevel gear to revolve in the opposite direction from the first disk, the second piston having a face flange forming art of an annular piston chamber, and a cy indrical drum portion and a vertical drum wall forming the remainder of said` chamber, each of said disks provided with a plurality of pistons at equal circumferential intervals,

21. In an engine of the character designated, the combination of two oppositcly revolving disks each havin a plurality of equi-distant duplex-cam s aped face pistons, annular channels in which said pistons travel, and movable abutment heads coperating with said pistons.

22. In `an engine ofthe character designated, the combination of two oppositely revolvin disks each having a plurality o eqni-dlstant duplex-cam shaped face pistons, medially positioned movable abutment heads mounted 1n the frame between the disks and cooperating with the latter, for the purpose described.

Q3. The combination of a shaft, a 'piston disk thereon having a face flange forming part of an annular piston channel or chamber, said chamber being also formed partly by the face of said disk, and partly by a cylindrical wall of a drum within which the disk is fitted, and partly by a vertical face or wall of the drum, a bevel gear upon said shaft, a bevel pinion meshing with said gear, an opposite bevel gear also meshing with said pinion, a piston disk connected to the last-mentioned bevel gear to revolve in the opposite direction from the first disk, and heads or movable abutments to coperate with the pistons, guide-openings being provided for said heads in a framework between said disks, said train of bevel gears mounted upon said framework.

24. The combination with two oppositelyrevolving disks, each having a plurality of pistons, and annular channels in which said pistons travel. of heads or movable abutments to coperate with the pistons, guideopcnings being provided for 'said heads, each of said heads being double or comprising two heads which move as one piece, one for engagement with the pistons or cams of one disk, and the other for engagement with the pistons or cams of the opposite disk.

25. The combination with two oppositelyrevolving disks, each having a plurality of pistons, and annular channels in which said pistons travel, of heads or movable abutments'to cooperate with the pistons, guideopenings being provided for said heads, each of said heads being double or comprising two heads which move as one piece, one for engagement with the pistons or cams of one disk, and the Vother for .engagement with the pistons or cams of the opposite disk, said heads fitting in said annular piston channels to close the same and divide the segmental space between any two pistons into subchambers.

26. The combination with two oppositelyrevolving disks, each having a plurality of pistons, and annular channels in which said pistons travel, of heads or movable abutments to coperate with the pistons, guideopenings being provided for said heads, each of said heads being double or comprising two heads which move as one piece, one for engagement with the pistons or cams of one disk` and the other for engagement with the pistons or cams of theopposite disk, said heads fitting in said annular piston channels to` close the same and divide the segmental space between any two pistons into subchambers, and means to coi'iperate with said pistons and said channels, to cause inspiration, compression. explosion and exhaust to occur at the same time in the appropriate sub-chambers during each half revolution of each disk.

2. The combination with two oppositelyrevolving disks, each having a plurality of pistons, and annular channels in which said pistons travel, of heads or movable abutments to coperate with the pistons, guideopenings being provided for said heads, each of said heads being double or comprising two heads which move as one piece, one for engagement with the pistons or cams of one disk. and the other forengagemcnt with the pistons or c'ams of the opposite disk, said heads Fitting in said annular piston channels to close the same and divide the segmental space between any two pistons into subpistons and said channels. to canse inspiration, compression, explosion and exhaust to occur at the same time in the appropriate sub-chambers during each half revolution of each disk. each double head being in the form of a bar tted in the guide-slots in opposite inner drum walls.

28. The combination with two oppositelyrevolving disks, each having a plurality of pistons, and annular channels in which said pistons travel, of heads or movable abutments to coperate with the pistons, guidechambers, and means to cooperate with said openings beiifg provided t'or said heads, each of said heads beingr double or eomprising two heads whieh move as one piece, one for engagement. with the pistons or cams oi. one disk, and the other for engagement with the pistons or eanis of the opposite disk. said heads titting,r in said annular piston ehannelsto elose the same and -divide the segmental s aee between any two pist-ons into sube amber-s. and means to eoiiperate with said pistons and said channels. to eanse inspiration. compression. explosion and exhaust to oeenr at the same time in the appropriate sub-chambers durinlar eaeh half revolution oi' of eaeh disk. said heads beingy so separated that when ani' double head stands at. the apex of one piston. it stands at the bottom of a piston upon the opposite disk.

Q9. The combination with two oppositelvrevolvinpr disks. eaeh having a plurality ot' pistons. and annular channels in whieh said pistons travel. of heads or mo 'able abniments to eoiiperate with the pistons. guideopenings being provided for said heads. each of said heads being double or comprising two heads` -whieh move as one pieee. one for engagement with the pistons or eam ol' one disk. and the other for engagement wit h the pistons or earns of the opposite disk. sa id heads fitting in said annular piston eliannelsto elose the saine and divide the segmental space between any two pistons into subchalnbers, and means to eoiiperate with said pistons and said channels. to cause inspiration, compression, explosion and exhaust to occur at the same time in the appropriate sub-Chambers during eaeh halt revolution ol' of each disk. the double, heads in eaeh pair being separated a distant-e eunal to the length of the sloping side of a piston, so that a double head may be forced aside b v a cam or piston, while at its opposite end it rides down the slope of the eam or piston upon the opposite disk.

30. The combination of a rotary disk having a plurality of pistons thereon formed with sloping sides, a movable head, means to enable said head to eoperate with said pistons successively to draw in explosive charges, a second head. Ine-ans to enable the second head to coperate with said pistoia successively to compress the charges, mean.` to enable the same heads to cooperate with said pistons to explode the compressed charges1 and expel the exploded gases, a e vlindex' or Chamber into compressed, said cylinder having an outlet port, a valve in said cylinder to elose said port, said valve connected to one ot' said heads, to be moved thereby to open the port. and a lock into which the compressed rharge is received through said Vort.

31. The combination oi) a rotar)-Y disk having a plurality of pistons thereon formed with sloping sides, a movable head, means to which each charge is enable said head to eoiperale with said pis-- tons snreessively to draw in explosive eharges. a seeond heznhineans to enable the seeond head to cooperate with said pistons sueeessively to compress the eharges, means to enable. the same heads to eoiiperate with said pistons to explode the eompressed charges, and expel the exploded aeases, a eviinder or chamber into whieh each charge is compressed, said cylinder having an outlet port, a valve in said Cylinder to elose said port. said valve eonneeted to one ot' said heads, to be moved thereby to open the port, and a loek into wliieh the eompressed charge is reeeived through said port, said loi-k having an outlet-valve, means to open and eiose the valve. and means to explode the eonipressed charge.

252. The eombination of opposiielv revolving;r disks provided with pistons. annular channels in whieh said pistons travel, and movable heads to elose said eliannels and eooperate with the pistons. eaeh eliannel provided with an inlet port and an exhaust port, and eaeh eliannel. also in. eon'iniunieation with a chamber inwhieh the eli-arge is eoinpressed, together with said eoinpression ehainber, for the purpose desi-ribed.

33. The eombination of oppositelv revolving disks provided with pistons, annular ehannels in which .aid pistons travel, movable heads to elose `said e'hannels and eoiperate with the pistons. eaeh rhannel provided with an inlet port and an exhaust port. and eaeh channel also in eoinnnlnieation with a Chamber in whieh the eharge is eoinpressed. a loek eommon to `said ehanibers and out of eonnnnnieation with them while the eharges are being; sulijeeted to eolnpression, and means ior automatimll)r opening colnn'innication between the eliainbersand said lock at the eonelnsion ot' the Compression operation.

34. The combination ot' oppositelv revolving disks provided with pistons. annular channels in whieh said pistons travel` Inovable heads to Close said ehannels and eoiiperate with the pistons. oai-h channel provided with ain inlet port and an exhaust port, and eaeh channel also in communie-ation with a elianiber in whieh the Charge is conipressed, a loek common to said elianibers and ont otl commiinn-ation with them while the charges are being;r subjeeted to rompi-ession. means for autoniatieail),v opening romniunioation between the ehambers and said lock at the conclusion of the eoinpression operation, and reeiproeatinel piston valves in said ehambers and eonneeted to said heads` said chambers having ports to eonimunieate with said loek. said ports elosed b v said valves at the eoniiiression oi'ieration. but opening antonnitieallv at the movements of the Correspondingr heads,

35. The combination ot oppositely revolvil (l ing disks provided with pistons, annular channels in which sald pistons travel, movable heads to close said channels and copvalves opening into said channels, and

means for automatically controlling the openin and closing,r of said valves.

36. he combination of oppositely revolving disks provided with pistons, annular channels in which said pistons travel, movable heads to close said channels and coperate with the pistons, each channel provided With an inlet port and an exhaust port, and each channel also in communication with a chamber in which the charge is compressed, a'lock'common to said chambers and outl of communication with them While the charge's are being subjected to compres sion, means for automatically openingr communication between the chambers and said lock at the conclusion of the compressionoperation, said lock provided with valves opening into said channels, means for automatically controlling the opening and `closing,r of said valves, said controlling means including cams provided upon said rotating disks, and means for enablingr said cams to operate said valves.

37. The combination of oppositely `re volving disks provided with pistons, annular channels in which said pistons travel. movable heads to close said channels, and ,cooperate with the pistons, each chal-nel provided with an inlet portand an exhaust port, and each channel also in communica` tion with a chamber in which the charge is compressed, a lock common to said chambers and out of communication with them While the charges' are beingr subjected to compression, means for automatically open ing communication between the chambers and said lock at the conclusion of the compression operation, said lock provided with valves openingr into said channels, means for automatically controlling the opening and closing of said valves, said controlling' means including cams provided upon said rotating disks, means for enabling said cams to operate said valves, said valves mounted in the opposite ends of said lock, and yieldingr means being;l provided common to said valves for returning the valves to their seats.

38. The combination of oppositely revolving disks provided with pistons, annular channels in which said pistons travel, movable heads to close said channels andV cooperate with the pistons, each channel provided with an inlet port and an exhaust port, and cach channel also in communication with a chamberin which the charge is compressed, a lock common to said chambers and out of communication with them while ,the charges are beingr subjected to compression, means for automatically opening communication between the chambers and said lock at the conclusion of the compression operation, and reciprocating piston valves in said chambers and connected to said heads, said chambers having ports to communicate with said lok, said ports closed by said valves at the compression operation, but openingr automatically at the movements of the correspondingr heads` the heads for one channel being rigid with those for the other channel.

39. The combination of oppositely revolving disks provided with pistons, an-

nular channels in which said pistons travel,

movable heads to close said channels and cooperate With the pistons, each channel provided with an inlet port and an exhaust port, and each channel also in communication with a chamber in .which the charge is compressed, a lock common to said chambers and out of communication with them while the charges are being subjected to compression, means for automatically opening communication between the chambers and said lock at the conclusionpf the com ression operation, and reciprocating piston valves in said chambers and connected to said heads, said chambers having ports to communicate with said lock, said r ports closed by said valves at the compression operation, but opening automatically at the movements of the corresponding heads, the heads for one channel being rigid with those for the other channel, and said piston valves being fixed upon certain of said heads.

40. The combination of oppositely revolving disksA provided with pistons, annular channels in'which said pistons travel, mov.

able heads to close said channels and cooperate with the pistons, each channel providedwith an inlet port and an exhaust port. and each channel also in communication /with a chamber in which the charge is combeinlr riffid with those for the other channel, and said piston valves being tixed upon certain of said heads` certain of said heads having ports Vfor the passage of the eompressed charges through the heads into the compression chamber.

4l. The combination ot oppositelv revolving disks provided with pistons, annular channels in which said pistons travel, movable heads to close said channels and cooperate with the pistons, each channel provided with an inlet port and an exhaust port, and each channel also in communication with a chamber in which the charge is coinpressed, a `lock common to said chambers and out ot communication with them while the charges are being subjected to compres sion, means for automatically opening communication between the chambers and said lock at the conclusion of the compression operation, and reciprocatingr piston valves iii said chambers and connected to'said heads, said chambers having` ports to communicate with said lock, said ports closed by said valves at the compression operation, but opening automatically at the movements of the corresponding heads, the heads for one channel being rigid with those for the other channel, and said piston valves being- Fixed upon certain ot said heads, certain of said heads having ports for the passage of the compressed charges through the heads into the compression chamber, said compression ports rovided with back-check valves.

42. he combination ot' oppositely revolving disks provided with pistons, annular channels in which said pistons travel, movable heads to close said channels and co operate with the pistons, each channel pro vided with an inlet port and an exhaust port, and each channel also in communication with a chamber in which. the charge is compressed, a lock common to said chambers and out of communication with them while the charges are being subjected to compres sion, means for automatically opening communication between the chambers and said lock at the conclusion of the compression operation, reciprocating pid-on valves in said chambers and connected to said heads, said chambers having ports to communicate with said lock, said ports closed by said valves at the compression operation, but opening automaticallyr at the movements of the corresponding heads, the heads for one channel being rigid with those for the other channel,` and said piston valves being fixed upon certain of said heads, certain of said heads having ports for the passage of the compressed charges through the heads into the compression chamber, said compression ports provided with back-check valves, and means to enable said piston valves to draw in charges of mixed fuel and air and force and out of communication with them while` the charges are being subjected to compres sion., means for automatically opening com` munication between the chambers and said lock at the conclusion of the compression operation,` reciprocating piston valves in said chambers and connected to said heads, said chambers having ports to ci'nnmunicate with said lock` said ports closed b v said valves at the compression operation, but opening automatically at the movements of the corresponding heads, the heads for one channel being rigid with those for the other channel, and said piston valves being fixed upon certain of said heads, certain of said headshaving ports for the passage of the compressed charges through the heads into the compression chamber, said compression ports provided with hack-check valves, means to enable said piston valves to draw in charges of mixed fuel and air and force said charges into said lock to augment the explosive charge therein. said `chambers for this purpose having ports in their ends, and back-check valves in said ports, in eommunication with said lock.

44. The combination of oppositiely revolving disks provided with pistons, annular channels in which said pistons travel, movable heads to close said channels-and cooperate With the pistons, each channel provided With an inlet port and an exhaust port, and each channel also in communication with a chamber in which the charge is compressed, a lock common to said chambers and out of communication with them while the charges are being subjected to compression, means for automatically opening colnmunication between the chambers and said lock at, the conclusion of the compression operation, and reciprocating piston valves insaid chambers and connected to said heads, said chambers having ports to communicate with said lock, said ports closed by said valves at the compression operation. but opening automatically at the movements of the corresponding heads, the heads for one channel b eing rigid with those for the other channel, and said piston-valves heilig fixed upon certain of said heads, certain of said heads having ports for the passage of the compressed charges through the heads into the compression chamber. said piston- 1,362,4oo V rotate in the opposite direction, said companion disk having pistons to coperate With the pistons on the first disk to control the heads, heads being provided for said pistons upon said companion disk, the heads for the pistons upon one diskbeing connected to those for the pistons u on the opposite disk, to form double hea s to be cammed to and fro by the opposite pistons, so that each disk partly operates both its i own heads and those which coperate with the pistons of the other disk, andY yielding detents to hold said double heads in extreme ositions.

46. he combination of oppositely revolving disks provided with plstons, annular channels in which said pistons travel, movable heads to close saidchannels and cooperate with the pistons, each channel provided with an inlet port and an exhaust port, and each channel also in communication with a chamber in which the charge is compressed, a lock common to said chambers and out of communication with them while the charges are being subjected to compression, means for automatically opening communication betwen the chambers and said lock at the conclusion of the com ression operation, reciprocating piston-va ves in said chambers and connected to said heads, said chambers havin ports to communicate with said lock, sait? ports closed by said valves at the compression operation, but opening automatically at the movements of the corresponding heads, the heads for one channel being rigid with those for the other channel, and said piston-valves being fixed upon certain of sald heads, certain of said heads having ports for the passage of the compressed charges through the heads into the compression chamber, said compression ports provided with back-check valves, means to enable said piston-valves to draw in charges of mixed fuel and air and force said charges-into said lock to augment the explosive charge therein, said piston-valves being cupped out to increase the capacity of the chambers to receive the. compressed charge,.and means for automatically lock-l ing said detents and releasing them.

47'. The combination of oppositely revolving disks provided with pistons, annular channels in which said pistonsv travel, movable heads to close said channels and coperate With the pistons, each channel provided With an inlet port and an exhaust port, and each channel also in communication with a chamber in which the charge is compressed,y and a lock for compressed charges, said lock common to said channels.

48. The combination of oppositely revolvlingdisks provided with pistons, annular channels in which said pistons travel, movable heads to close said channels and coperate with the istons, each channel provided With an lnlet port and an exhaust port, and each channel also in communication with a chamber in which the charge is compressed, a lock for compressed charges, saidA lock common to said channels, and means foradmitting the compressed charges to said lock at the conclusion of the exploding and expanding operation.

49. The combination with oppositely rotating disks havin pistons on their faces, of annular channe s in which said pistons travel, and means coperating With said pistons and channels to effect intake, compression, explosion, expansion and exhaust twice in each rotation.

50. The combination with opposite] rotating disks having pistons on their aces, of annular channels in which said pistons travel, an exploding lock or chamber 00mrnon to said'c annels, and means cooperating with said pistons and channels to eifect intake, compression and exhaust.

JOSEPH DEUBEL. 

